Abstract : The trend of Open Data and Internet-of-Things initiatives contribute to the ever growing amount of data available through web APIs. While building web applications has become easier with recent advancement in web development technologies and proliferation of JavaScript frameworks, the access to data from various APIs and data stores still poses certain challenges. It often requires complex setup and advanced programming skills that hinder the rapid prototyping efforts. Therefore, we propose Endev, a declarative framework for prototyping applications that is built on modern web technologies and supports building modern web applications, that utilize the vast amount of available data, without the need for setup or write complex JavaScript code.